Why was the high-fat profile of the historical Greenlandic diet beneficial?

Answer

It provided critical fats needed to insulate the body against extreme cold

The consumption of extremely high levels of animal fats, derived mainly from marine sources, was not merely a preference but an absolute physiological requirement for survival in the severe Arctic environment. These fats served as vital insulation, helping the human body retain necessary warmth and regulate temperature against the relentless cold. This contrasts sharply with modern dietary advice, which generally recommends minimizing fat intake; however, in the Arctic context, high fat intake represented an optimal adaptation for energy maintenance and thermal regulation.

Why was the high-fat profile of the historical Greenlandic diet beneficial?
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